using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Net;

namespace Zelda_Oracles_Suite
{
    [DefaultEvent("StatusChanged")]
    public partial class DownloadableListBox : ComboBox
    {
        private string listName;
        [Browsable(true), DefaultValue("")]
        public string ListName { get { return listName; } set { listName = value; } }

        public delegate void StatusChangedEventHandler(object sender, StatusEventArgs e);
        public event StatusChangedEventHandler StatusChanged;

        private int forceIndexCount = 256;
        [Browsable(true), DefaultValue(256)]
        public int ForceIndexCount { get { return forceIndexCount; } set { forceIndexCount = Math.Max(1, value); ParseListText(); } }

        private string displayedCategory = "";
        [Browsable(true), DefaultValue("")]
        public string DisplayedCategory { get { return displayedCategory; } set { displayedCategory = value; ParseListText(); } }

        private string listText = "";

        public DownloadableListBox()
            : base()
        {
            InitializeComponent();
            this.DropDownStyle = ComboBoxStyle.DropDownList;
        }

        public void DownloadList()
        {
            try
            {
                if (!Directory.Exists("./lists"))
                    Directory.CreateDirectory("./lists");
                WebClient wb = new WebClient();
                wb.DownloadFileCompleted += new AsyncCompletedEventHandler(wb_DownloadFileCompleted);
                wb.DownloadProgressChanged += new DownloadProgressChangedEventHandler(wb_DownloadProgressChanged);
                wb.DownloadFileAsync(new Uri(Settings.ListsLocation + listName + ".ini"), "./lists/" + listName + ".ini");
            }
            catch (Exception ex)
            {
                if (StatusChanged != null)
                    StatusChanged(this, new StatusEventArgs(ex, "Failed to retrieve " + listName + ".ini"));
            }
        }

        private void wb_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
        {
            if (e.Cancelled && StatusChanged != null)
                StatusChanged(this, new StatusEventArgs(e.Error, "Download cancelled for " + listName + ".ini"));
            else if (e.Error != null && StatusChanged != null)
                StatusChanged(this, new StatusEventArgs(e.Error, "Failed to retrieve " + listName + ".ini"));
            else if (StatusChanged != null)
                StatusChanged(this, new StatusEventArgs(null, "Successfully retrieved " + listName + ".ini"));
            listText = "";
            ParseListText();
        }

        private void wb_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
        {
            if (StatusChanged != null)
                StatusChanged(this, new StatusEventArgs(null, "Downloading list " + listName + ".ini - " + (int)((double)e.BytesReceived / (double)e.TotalBytesToReceive * 100) + "%"));
        }

        public void ParseListText()
        {
            if (listText.Length == 0)
            {
                try
                {
                Load:
                    if (File.Exists("./lists/" + listName + ".ini"))
                    {
                        StreamReader sr = new StreamReader(File.OpenRead("./lists/" + listName + ".ini"));
                        listText = sr.ReadToEnd();
                        sr.Close();
                    }
                    else if (Settings.AutoDownloadLists)
                    {
                        DownloadList();
                        goto Load;
                    }
                }
                catch (Exception)
                {

                }
            }

            DataSource = null;
            Items.Clear();

            string[] cboLines = new string[forceIndexCount];
            if (listText.Length > 0)
            {
                string[] lines = listText.Replace("\r", "").Split('\n');
                string currentCategory = "";
                foreach (string line in lines)
                {
                    if (line.Length == 0)
                        continue;
                    if (line.StartsWith("["))
                    {
                        currentCategory = line.Substring(1, line.Length - 2);
                        continue;
                    }
                    if (displayedCategory != "" && currentCategory.ToLower() != displayedCategory.ToLower())
                        continue;
                    if (!line.Contains("="))
                        continue;
                    string[] parts = line.Split('=');
                    if (parts.Length < 1)
                        continue;

                    int index = -1;
                    int.TryParse(parts[0], System.Globalization.NumberStyles.HexNumber, null, out index);
                    if (index > -1 && index < forceIndexCount)
                    {
                        string hex = index.ToString("X");
                        if (hex.Length == 1)
                            hex = "0" + hex;
                        if (parts.Length > 1)
                            cboLines[index] = hex + " = " + parts[1];
                        else
                            cboLines[index] = hex;
                    }
                }
            }

            for (int i = 0; i < forceIndexCount; i++)
            {
                if (cboLines[i] == null || cboLines[i].Length == 0)
                {
                    string hex = i.ToString("X");
                    if (hex.Length == 1)
                        hex = "0" + hex;
                    cboLines[i] = hex;
                }
            }

            this.DataSource = cboLines;
        }
    }

    public class StatusEventArgs : EventArgs
    {
        public Exception Exception { get; set; }
        public string Status { get; set; }
        public StatusEventArgs()
            : base()
        {

        }

        public StatusEventArgs(Exception ex, string s)
            : this()
        {
            this.Exception = ex;
            this.Status = s;
        }
    }
}